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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 609 · 40 questions
TalentJR

How it works (Round and adjust): Round up: 49 is 50 − 1, 98 is 100 − 2. Multiply by the round number. Take away the number times the bit you added.

NameDateTime takenScore ___ / 40
  1. 1.9 × 19 =
  2. 2.17 × 99 =
  3. 3.8 × 49 =
  4. 4.5 × 19 =
  5. 5.7 × 9 =
  6. 6.7 × 49 =
  7. 7.21 × 98 =
  8. 8.13 × 19 =
  9. 9.15 × 49 =
  10. 10.11 × 19 =
  11. 11.3 × 9 =
  12. 12.10 × 9 =
  13. 13.4 × 49 =
  14. 14.24 × 99 =
  15. 15.4 × 19 =
  16. 16.3 × 29 =
  17. 17.3 × 9 =
  18. 18.13 × 29 =
  19. 19.7 × 9 =
  20. 20.10 × 49 =
  21. 21.21 × 99 =
  22. 22.6 × 19 =
  23. 23.6 × 19 =
  24. 24.12 × 29 =
  25. 25.10 × 19 =
  26. 26.14 × 9 =
  27. 27.6 × 19 =
  28. 28.6 × 29 =
  29. 29.14 × 9 =
  30. 30.11 × 98 =
  31. 31.39 × 99 =
  32. 32.8 × 49 =
  33. 33.4 × 9 =
  34. 34.14 × 9 =
  35. 35.13 × 9 =
  36. 36.12 × 19 =
  37. 37.9 × 19 =
  38. 38.9 × 49 =
  39. 39.4 × 29 =
  40. 40.26 × 98 =

Answer key

  1. 171
  2. 1683
  3. 392
  4. 95
  5. 63
  6. 343
  7. 2058
  8. 247
  9. 735
  10. 209
  11. 27
  12. 90
  13. 196
  14. 2376
  15. 76
  16. 87
  17. 27
  18. 377
  19. 63
  20. 490
  21. 2079
  22. 114
  23. 114
  24. 348
  25. 190
  26. 126
  27. 114
  28. 174
  29. 126
  30. 1078
  31. 3861
  32. 392
  33. 36
  34. 126
  35. 117
  36. 228
  37. 171
  38. 441
  39. 116
  40. 2548

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